from

$788.99

Dual Valve Springs from COMP Cams are manufactured from Super Clean wire and subject to extensive quality control testing to deliver a valve spring assembly with superior strength, durability and valve train stability, no matter what the application. The dual spring design creates a stronger valve spring that can easily handle the increased lift found in extreme stress applications. COMP Cams Dual Valve Springs exceed the expectations of today’s engine builders and racers.

Product Features:

Seat pressure: 112 lbs. @ 1.900″, Open Pressure: 355 lbs. @ 1.200″
O.D.: 1.509″, I.D.: 0.697″
Dual valve springs with damper

from

$349.99

A higher than stock stall speed as delivered by a B&M Converter will provide several advantages. The high stall converter allows the engine to launch the car at a higher RPM where more torque is available and increased strength.

Product Features:

New Precision Pump Drive Tube
Pressure Tested
Fully Balanced
Needle Thrust Bearing
New Thrust Washer

from

$368.99

Product Features:

Designed for Optimum Torque and Acceleration
Maximum Performance From Idle through Mid-Range
Matched to Edelbrock Performer Intakes
Includes Hydraulic Lifters and Assembly Lube
Major Improvement in Throttle Response and Torque
Use For Daily Drivers/Trucks/Vans/RVs/4x4s
Take The Guesswork Out Of Camshaft Selection

from

$81.99

Product Features:

Solid Bushing Chain Resists Stretching
For Use with Stock or Edelbrock Camshafts
Stressproof Steel Crank Gears
3 Keyway Setting Points To Ensure Accurate Timing
True Bearing Surface Rolls with the Sprockets

from

$49.99

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

Fluoroelastomer compound combines optimum resistance to heat, oils and abrasion for longivity.
Optimizes performance under high crankcase vacuum conditions, elevated temperatures and high RPM levels.
Not intended for use in emission controlled vehicles.

from

$46.99

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

Rigid core, molded silicone rubber gaskets provide for ease of installation, and are great for on-again/off-again situations (like setting valve lash).
Features high-tech silicone material for long life, a solid steel core for strength and durability, and stainless steel compression limiters to prevent
Not intended for use in emission controlled vehicles.

from

$27.49

Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.

Product Features:

Opens At 195 Degrees
Designed to Resist Large Variations of Coolant Pressure at High RPM
Fully Opens at Correct Temperature Consistently Regardless of Engine RPM
For High Performance Street, Drag Race, and Oval Track
Copper & Brass Construction – Resists Corrosion
High Flow

from

$25.99

Precision die cast, these water necks are first polished to a high luster, then chrome plated. Features an O-ring style seal to prevent water leaks. Comes with O-ring gasket and mounting bolts.

Product Features:

Chrome plated
Features an O-Ring style seal to prevent water leaks
Includes O-Rings and mounting bolts

from

$38.49

Mr. Gasket Harmonic Balancer Bolt for Ford V8 except 351C. Fits 221,260,289,302,351W small block Windsor engines, 332,352,360,390,406,410,427,428 FEs, and 429,460 385 series big blocks. 5/8-18 x 2 inch long heat treated black oxide coated Grade 8 alloy steel with a thick parallel ground washer to provide accurate, uniform torque.

Product Features:

Heat treated black oxide coated Grade 8 alloy steel
Thick parallel ground washer provides more accurate, uniform torque
Hex Prevents Socket Slippage
Accurate And Uniform Torque
Black Plated Finish

from

$28.99

Available in kits including front cover gasket, crankshaft seal, fuel pump and water pump gasket or including cover gasket and front seal.

Product Features:

Timing Cover Gasket And Oil Seal Kit

from

$20.99

Mr. Gasket Performance Timing Cover Gaskets are high-density cork/rubber blend gaskets that use evenly sized cork particles distributed evenly throughout the rubber binder. The result is a compressible gasket without leak paths. These gaskets create a positive seal by controlled swelling of the gasket material when exposed to hot engine oil. Provides excellent flange sealing and durability. For original equipment replacement, high performance street, drag race and oval track use.

Product Features:

Manufactured from high-density cork/rubber blend gasket material
Provides excellent sealing and durability
For OE replacement, high performance street, drag race and oval track use

from

$100.99

Product Features:

Use W/ Valve Springs Part #5822, 5882, 5896, 5872, 5867, 5812, 5857
Set of 16
1.50 in. Outside Diameter
Steel Material
Black Oxide Finish

from

$31.99

COMP Cams offers a complete line of valve stem seals, from the umbrella seals to the positive-stop Teflon seal. These seals are a must to keep unwanted oil from entering the combustion chamber through the clearance in the valve guides. The umbrella seal is normally used when a larger-than-stock diameter spring is used, in the case of a double spring, the positive-stop Teflon seal is used. The umbrella seals require no machining, but with the Teflon seal it is necessary to disassemble the heads and machine the top of the guide with a special .530 diameter cutter. Whenever you are planning an engine overhaul or a cam change, don’t forget the valve seals.

Product Features:

Work with .530″ guides and 3/8″ valve stem diameter
Valve stem oil seals keep unwanted oil from entering the combustion chamber
Several different types of valve seals are offered

from

$25.49

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

Felcoid/Plus gaskets have a fiber sheet core and a latex rubber coating to eliminate potential leakage paths. The core material resists crushing and splitting, while providing excellent blowout resistance.
With steel core to provide ultimate excellent blowout resistance.
Not intended for use in emission controlled vehicles.

from

$59.19

High performance, race quality gasket with molded rubber coating over a steel core. Steel core provides rigidity and durability, preventing prevent push out while the molded rubber coating helps seal minor oil pan rail irregularities. The one piece design eliminates the need for separate end seals to make installation easier and even further reduce the possibility of oil leakage. Provides excellent sealing and durability. Excellent replacement for stock original equipment, high performance street, drag race and oval track. Includes gasket and new oil pan bolts.

Product Features:

Steel core provides rigidity, durability and prevents gasket push out
Molded rubber coating seals minor irregularities in pan surface
One piece design is easier to install and even less prone to leak
Direct replacement suitable for all uses – street, racing, heavy duty
Include both gasket and new oil pan bolts
No Cork Particles
Easy Removal For Disassembly

from

$28.99

Product Features:

Clean Positive Seal
Embossed Silicone Bead Surrounding The Port
Matched To Manifolds And Cylinder Heads

from

$39.99

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

Fel-Pro performance intake manifold gaskets have been tested with virtually all aftermarket cylinder head and intake manifold combinations.
Performance intake manifold gaskets designed without a metal core, to allow engine builders to trim the gasket for exact fit on modified ports.
Standard and Low riser
Printoseal elastomeric sealing beads to provide extra sealing strength around the intake port.
Not intended for use in emission controlled vehicles.

from

$451.99

Maximum cooling for street and racing engines. Internal passages are balanced for maximum flow. Impeller is larger than others for maximum pressure. Impeller vanes dramatically increase flow rates. Equal distribution to both sides of block. Only flows in one direction for optimum efficiency. In the early days of the automotive performance industry, you either ran what was available, or you fabricated something you thought met your needs. Such needs were the building blocks of this industry, and it was through the efforts of many that we have the automotive aftermarket, but it was through the work of one name in particular to which many in the industry owe a great debt, and that name is Edelbrock.

Product Features:

Maximum Cooling for Street and Racing Engines
Internal Passages Are Balanced for Maximum Flow
Impeller is Larger than Others For Max Pressure
Impeller Vanes Dramatically Increase Flow Rates
Equal Distribution to Both Sides of Block
Only Flows in One-Direction for Optimum Efficiency

from

$315.99

Maximum cooling for street and racing engines. Internal passages are balanced for maximum flow. Impeller is larger than others for maximum pressure. Impeller vanes dramatically increase flow rates. Equal distribution to both sides of block. Only flows in one direction for optimum efficiency. In the early days of the automotive performance industry, you either ran what was available, or you fabricated something you thought met your needs. Such needs were the building blocks of this industry, and it was through the efforts of many that we have the automotive aftermarket, but it was through the work of one name in particular to which many in the industry owe a great debt, and that name is Edelbrock.

Product Features:

Maximum Cooling for Street and Racing Engines
Internal Passages Are Balanced for Maximum Flow
Impeller is Larger than Others For Max Pressure
Impeller Vanes Dramatically Increase Flow Rates
Equal Distribution to Both Sides of Block
Only Flows in One-Direction for Optimum Efficiency

from

$636.99

Product Features:

Square Flange Carburetor Mounting
Special D-Shaped Port Runner Design
Large Plenum Chamber

from

$451.99

Race winning design for all types of competition. Single plane maximizes torque and horsepower. Runners feature extra material for custom porting. For performance in 3500 to 7500 RPM range. For modified OE or aftermarket Windsor aluminum heads. Match with Edelbrock heads for maximum performance. Port exits can be opened to 2.10 x 1.18 inch. In the early days of the automotive performance industry, you either ran what was available, or you fabricated something you thought met your needs. Such needs were the building blocks of this industry, and it was through the efforts of many that we have the automotive aftermarket, but it was through the work of one name in particular to which many in the industry owe a great debt, and that name is Edelbrock.

Product Features:

Race Winning Design for all Types of Competition
Single Plane Maximizes Torque and Horsepower
Runners Feature Extra Material for Custom Porting
For Performance in 3500 to 7500 RPM Range
For Modified OE or Aftermarket Windsor Alum Heads
Match with Edelbrock Heads for Max Performance
Port Exits Can be Opened to 2.10 x 1.18 in.

from

$576.99

Edelbrock part #75213 RPM Air-Gap intake manifold is designed for street 289 302-347 c.i.d. Ford V8’s. The RPM Air-Gap incorporates the same race-winning technology that’s been used on our Victor Series competition intakes for decades. The Air-Gap design

Product Features:

1500-6500 RPM Range
Dual Plane Type-4150 Style Flange
4.3 in. Front Height, 4.9 in. Center Height, 5.5 in. Rear Height
Black Powder Coated Finish
Made In The USA

from

$186.99

Product Features:

Head: 4.500″ Bore/0.048″ Thick/12.5cc Vol.
Intake: 1.98″x2.26″ Port/.060″ Thick
Exhaust: 1.50″x2.10″ Port
5/16″ Valve Cover
Multi Piece Configuration

from

$41.99

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

Fel-Pro Performance head gaskets accommodate the high cylinder pressures and cylinder head movement associated with performance engines.
Inserted within a stainless steel armor surrounding each cylinder, wire ring design provides highly concentrated sealing around the combustion chamber.
Raises combustion sealing force to roughly three times that of standard head gaskets.
Steel wire rings for the greatest combustion seal strength.
Not intended for use in emission controlled vehicles.

from

$58.99

Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:

PROPRIETARY COATING – Nonstick anti-friction coating seals small surface imperfections
NO RETORQUE DESIGN – Steel core helps eliminate the need for retorquing head bolts
SUPERIOR SEAL – Precise embossed Printoseal sealing beads at all vital areas to eliminate leak paths
STRONG AND DURABLE – Features graphite or reinforced fiber facing material and steel armor for strength and durability
DESIGNED FOR IMPERFECT SEALING SURFACES – Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces

from

$284.99

An older member of the COMP Cams grind family, the Magnum series of camshafts offers excellent performance gains over stock without the added wear and tear associated with more aggressive camshafts. Ideal for use with higher compression ratio engines that

Product Features:

Best with aftermarket torque converters and 9.5:1 compression.
Great high RPM power.
Easy on valve train parts.
Can be used with mild ratio rocker arms and traditional performance valve springs.

from

$550.99

Ideal for use with mainly stock components like rocker arms, intake manifolds, cylinder heads, compression ratio, torque converters and rear gear ratios, the High Energy camshaft grind family is a great choice for street performance applications. Offering

Product Features:

Good blend of efficiency and performance.
Perfect choice for performance street rebuilds.
Work well with mainly stock components such as rockers, manifolds, heads, compression, torque converters and gears.

from

$257.99

Featuring a quicker valve opening, the Xtreme Energy camshaft profile provides increased responsiveness and more area under the lift curve than older, slower grinds. Designed to increase performance without sacrificing driveability and creature comforts,

Product Features:

Excellent performance in street carbureted applications.
More vacuum allows an increase in duration for improved performance and assists power brakes.
Quicker opening lobe profiles deliver increased responsiveness and more area under the lift curve.
Best performance with aftermarket intake manifolds, headers, lower gear ratios etc.

1973 Mercury Marquis Performance Engines

More 1973 Mercury Marquis Performance Engines

Essential 1973 Mercury Marquis Performance Engines

Competition Cams – VALVE SPRINGS, 1.509" DUAL 1 ST (Part No.924-16)

B & M – Torque Converter, Tork Master 2000 (Part No.40427)

Edelbrock – Performer-Plus Camshaft Kit for Big-Block Ford 429/460 V8 (Part No.2167)

Edelbrock – Performer-Link Adjustable True-Roller Timing Chain Set (Part No.7821)

FEL-PRO Performance – Engine Crankshaft Seal Kit (Part No.2948)

FEL-PRO Performance – Engine Valve Cover Gasket Set (Part No.1684)

Mr. Gasket – High Performance Thermostat (Part No.4365)

Mr. Gasket – Water Neck (Part No.2663)

Mr. Gasket – Ultra Seal: Harmonic Balancer Bolt/Washer Kit (Part No.7847)

Edelbrock – Front Timing Cover Gasket Set #6991 For Small-Block Ford, With Front Seal (Part No.6991)

Mr. Gasket – Timing Cover Gasket Set (Part No.793G)

Edelbrock – Performer Series Retainer (Qty 16) (Part No.9724)

Competition Cams – VALVE SEALS, TEFLON 3/8" 1 ST (Part No.505-16)

FEL-PRO Performance – PERFORMANCE OIL PAN GASKET SET (Part No.1809)

Mr. Gasket – Ultra Seal: Oil Pan Gasket (Part No.6683)

Edelbrock – Intake Manifold Gasket for 302 E-Boss & 351W E-Boss Clevor Conversions (Part No.7265)

FEL-PRO Performance – Lower Intake Manifold Gasket Set: 5 Piece Set (Part No.1246)

Edelbrock – Water Pump for Small-Block Ford 1970-79 351C and 351M/400 in Polished Finish (Part No.8849)

Edelbrock – Water Pump for Small-Block Ford 1970-79 351C and 351M/400 in Satin Finish (Part No.8844)

Weiand – Hi-Ram; Intake Manifold (Part No.1993)

Edelbrock – Victor Jr. 302 Intake Manifold Small-Block Ford (Part No.2921)

Edelbrock – RPM Air-Gap Small Block Ford 302 Black Intake Manifold (Part No.75213)

Edelbrock – Engine Gasket Set (Head / Intake / Exhaust / Valve Cover) for Ford (Part No.7365)

FEL-PRO Performance – Cylinder Head Gasket: Steel Core Composite, Without Head Bolts (Part No.1020)

FEL-PRO Performance – Cylinder Head Gasket: Steel Core Composite, Without Head Bolts (Part No.1013)

Competition Cams – Magnum/Marine 253/253 Hydraulic Flat Cam for Ford 429,460 (Part No.34-337-4)

Competition Cams – High Energy 206/206 Hydraulic Flat Cam for Ford 221-302 (Part No.31-215-2)

Competition Cams – Xtreme Energy 218/224 Hydraulic Flat Cam for Ford 221-302 (Part No.31-238-3)

Popular 1973 Mercury Marquis Performance Engines Categories

1973 Mercury Marquis Performance Engines

Performance Engines Brands To Make Your 1973 Mercury Marquis Last

Popular Competition Cams Performance Engines

Top 1973 Mercury Marquis Performance Engines from Mr. Gasket

FAQs for 1973 Mercury Marquis Performance Engines

What are the most purchased Performance Engines for the 1973 Mercury Marquis?

What are the top-rated 1973 Mercury Marquis Performance Engines?

More Popular Parts for All Makes